Lock and latch.



PATENTED N0v.'20, 1906.

. J. LONG.

LOGK AND LATCH.

APPLICATION FILED JAN. 29. 1904.

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No. 836,515. v PATENTBD NOV. 20, 1906. J.LONG.

LOOK AND LATCH.

APPLICATION FILED JAN. 29, 1904.

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No. 836,515. PATENTED NOV. 20, 1906.

L LONG. LOCK AND LATCH. 'Arrmon'lori rum) JAN. 29. 1904.

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JOHN LONG, OF BIRKENHEAD, ENGLAND.

LOCK AND LATCH.

, Specification of Letters Patent.

Patented Nov. 20, 1906.

Application filed January 29, 1904. Serial N3. 191,194.

To all whom it may concern:

Be it known that I, JOHN LONG, mechanic, a subject of the King of GreatBritain, and a resident of Birkenhead, in the county of.

Chester, in the Kingdom of England, (whose post-oflice address is 230Brook street, Birkenhead aforesaid,) have invented certain new anduseful Improvements in Locks and Latches, (for which application hasbeen made in Great Britain under No. 2,397 and dated January 31,1903;also, No. 9,710, dated April 29, 1903,) of which the following is aspecification.

This invention relates to improvements in locks and latches for doorsand other purposes.

In the accompanying drawings, Figure 1 is a side elevation of a lock andlatch with back plate removed. Fig. 1 is a longitudinal sectional viewof the improved lock; Fig. 2, a view of the back plate separatedtherefrom; Fig. 3, the lock reversed, so as to show the other side; Fig.4, an enlarged view of the slide shown in Fig. 1; Fig. 5, a sideelevation of a form of latch with hinged bolt and having its back plateremoved. Fig. 6 is a view of the lock shown at Fig. 5 in reverseposition; Fig.

7, views showing the invention applied to a window-catch. Fig. 8 is adetail view of a slightly-different form of latch. Fig. 9 is a detailview of a conventional key used to inalnipulate the tumblers and bolt ofthe The lock is arranged so that the bolt can be locked by the knob orhandle that slides or operates the bolt. This is effected, according toFigs. 1 to 4, by providing a locking slide A in the sliding bolt B. Thislockingslide A is capable of sliding transversely in a groove in thebolt B, so that while the bolt B and slide A cannot move longitudinallyindependently of each other, yet the slide can move transverselyindependently of the bolt. The knob D, which is fastened to a shank d,secured to the slide A, operates the bolt as well as the slide, andthere is on the outer plate L of the look a longitudinal slot C, andtransverse slots 0 0 cut in the outer plate at right angles to C, so asto enable the knob D to have a transverse movement for looking as wellas a longitudinal movement for sliding the bolt. The lock or latchillustrated in these figures is what is known as a drawback lockthat isto say, the bolt B can be slid back longitudinally by the knob D and isreturned to its former position by spring E when the pull on the knob isreleased, but no farther, as the spring E comes against a stop U, and,furthermore, there is a stop M on the bolt and a stop N on the tumblerO.

P is a spring secured at Q, whose pressure keeps the tumbler downagainst the stop Consequently in the position shown the stop N on thetumbler O prevents the bolt being thrown beyond the position for use asa latch. The bolt can, however, be shot a farther step forward byinserting a key in the keyhole F. The key when turned comes against theabutment S on the tumbler O, and so raises the tumbler-stop N clear ofthe stop M on the bolt, also comes against the part T on the bolt andshoots it the remaining portion of its movement in the ordinary mannerof looks.

a is a spring fastened to the slide A (or it might be to a wall of theslot) and adapted to yieldingly retain the slide A so that it will beheld in whatever position it is moved into. The bolt is guidedlongitudinally by stationary projections K on the back plate engagingslots J in the bolt B.

It will be seen that by this invention the locking-slide at the end ofthe bolt is capable of being slidably moved at right angles to the boltand the knob-shank thereon being moved into engagement with one or otherof the slots 0 or 0 when the bolt is slid back by the knob or when shotforward by the key, or it can be released from the same. Therefore ifthe bolt is wholly withdrawn or wholly shot and this slide A be moved itwill engage the slots 0 or c and lock the bolt immovable, while if slidback again it will release the bolt.

In Figs. 5 and 6, in which B is a bolt pivoted at b, so that it can riseand fall to engage an ordinary catchplate, (not shown,) A is thelocking-slide in the pivoted latch B and adapted to slide in a slot insaid latch. The latch B and slide A cannot rise and fall independentlyof each other; but the slide A can be moved longitudinally andindependently of the latch B. The knob D, which is secured to the slideA, operates the latch B as well as the slide A, and there is in theouter plate L of the look a longitudinal slot C, and transverse slots' 00 out in the outer plate at right angles to C, so as to enable the knobD to have a longitudinal movement for looking as well as an up-and-downmovement for lifting and lowering the latch. Thus if the latch be whollyraised or wholly lowered, it can be locked immovable in either position.E is a spring for keeping the bolt B normally in engagement with theusual catch-plate. The slide A and the groove in the bolt in which itslides can be made of any suitable shape. The same principle can beapplied to Windowcatches, as shown in Fig. 7, in-which A is the slide S,the stud on which the knob D is secured; B, the bolt; E, the spring; C,the longitudinal slot, and c transverse slot, which in this case is onlyshown at one end, though there could be one at the other, if desired.

In Fig. 8 a night-latch is shown in which there is no provision made forshooting the bolt forward another step by turning the key, andconsequently the bolt is not shot out of reach of the spring E or anystud to limit the movement of said spring. In this case, therefore, theuse of a spring a is not required, as the spring E presses the slide Aagainst the bolt B and produces frictional contact between the parts,whereby the slide A is held yieldably in position against and in contactwith the bolt B.' It is obvious that the slide A need not necessarily beoperated by the handle D, which moves the bolt B, as it can, ifpreferred, be worked by means of a separate stud or finger attached tothe slide, in which case, of course, the slot C and slots 0 care placedin such a position as to correspond thereto.

I'declare that what I claim is 1. A lock comprising a casing providedwith a slot formed with a right-angular ofiset portion, a bolt mountedin said casing and provided with a slot, a block carried by and movablewithin the slot of said bolt, a spring carried by the block and bearingupon the wall of the slot, and arranged to prevent accidental movementand displacement of said block, and a locking-shank carried by saidblock and extending without the lock through the slot in the casing.

2. A lock comprising a casing provided with a slot with right-angularoffset portions at opposite ends, a bolt mounted within said casing, aspring arranged to move the bolt, a stud arranged to engage and stop thespring before the bolt has reached the limit of its movement, means tolimit the movement of the bolt under the tension of the spring andadapted to be released by a key to permit the bolt to be moved a fartherdistance, and means carried by the bolt and engaged within the slot tolock the bolt at either limit of its movement.

3. A lock comprising a casing having a slot with right-angular oifsetportions at opposite ends, a bolt mounted in said casing, a springarranged to move the bolt, a stud arranged to engage and stop the springbefore the bolt has reached the limit of its movement, a tumbler mountedin the casing, means carried by the tumbler to engage the bolt and limitits movement under the action of the spring and adapted to be releasedby a key to permit the bolt to be moved a farther distance, and meanscarried by the bolt, and within the slot for locking the bolt at eitherextreme of its movement.

In witness whereof I have hereunto signed my name, this 20th day ofJanuary, 1904, in the presence of two subscribing witnesses.

JOHN LONG. Witnesses:

G. C. DYMOND, J OHN MOLAOHLAN.

